William Porter's First Wife

I don't have definitive proof yet, but I have finally seen a first name for my 2nd  Great Grandfather's 1st wife. His daughter, Cordelia Porter James, died 7 May 1900. Her death record states that her mother's given name was Phebe. William has another daughter, named Phebe Rosella Porter, so this could be it. Now to find that elusive maiden name.